0 1 00:00:21,450 --> 00:00:22,170 Hello. 1 2 00:00:22,320 --> 00:00:31,520 In this video we are going to learn resolver encoder and what is the difference between resolver and 2 3 00:00:31,910 --> 00:00:33,580 encoder. 3 4 00:00:33,620 --> 00:00:37,110 I will make it bigger it for you. 4 5 00:00:37,370 --> 00:00:46,900 Let's check firstly this is our resolver and resolver it is used to understand the position of the motor. 5 6 00:00:46,910 --> 00:00:54,830 It can go turn forward or backward and the cables from resolver is 8, 8. 6 7 00:00:54,830 --> 00:01:05,060 Cable comes from this over and two is cos +/- and 2 is sin +/- and 2 is reference and 2 is from temperature 7 8 00:01:05,060 --> 00:01:07,070 sensor of the motor. 8 9 00:01:07,070 --> 00:01:12,200 And in here we have a encoder , for the encoder. 9 10 00:01:12,290 --> 00:01:20,010 We have a rotary encoder from autonics and on the encoder I can read for you it is. 10 11 00:01:20,240 --> 00:01:27,660 I am going to say E40H8 1024-6 l 5 11 12 00:01:27,800 --> 00:01:40,580 So this is 1024 PPR encoder in one turn it will create 1024 pulse for us and in here from encoder 12 13 00:01:40,820 --> 00:01:49,790 you can see the cabling for the cabling black cable from encoder is a + and red cable is a - 13 14 00:01:49,850 --> 00:01:57,920 and white cable is B + and B - and z+ z- and brown + positive so that means 14 15 00:01:57,920 --> 00:02:02,010 24 volt and the blue is 0volt and shield. 15 16 00:02:02,150 --> 00:02:10,610 So from encoder what we have also we have similar 8 cable is coming from encoder and one is just for 16 17 00:02:10,910 --> 00:02:21,200 shield then I will try to draw it here to the structure of resolver it and encoder to here and we will 17 18 00:02:21,200 --> 00:02:26,570 understand it better for the resolver where and what will we do. 18 19 00:02:26,660 --> 00:02:33,890 The structure is like this and I will put in here 19 20 00:02:37,740 --> 00:02:38,420 and than 20 21 00:02:45,800 --> 00:02:47,500 it will be like this but doesn't matter. 21 22 00:02:47,510 --> 00:02:56,940 This is cos is for the reference and this is sin and this is reference. 22 23 00:02:57,060 --> 00:03:06,690 So what happens for the resolver reference turns clockwise or counterclockwise and according to reference 23 24 00:03:06,750 --> 00:03:07,450 it is giving. 24 25 00:03:07,470 --> 00:03:09,060 This is really important point. 25 26 00:03:10,390 --> 00:03:20,160 Analog so it is giving an analog output to the drive analog to drive. 26 27 00:03:20,430 --> 00:03:21,380 So what happens. 27 28 00:03:21,410 --> 00:03:27,750 Drive can understand the position according to reference signals and reference signals understand 28 29 00:03:27,780 --> 00:03:33,740 the situation or position cos and sin situation or position. 29 30 00:03:33,750 --> 00:03:38,660 This is sin and this is cos is according to this reference. 30 31 00:03:38,670 --> 00:03:45,360 Can understand where I am and which value that I am going to send to drive than resolver 31 32 00:03:45,420 --> 00:03:55,880 Works like this the structure of resolver it is like this four encoder maybe you remember I will draw 32 33 00:03:55,880 --> 00:03:56,960 it in here. 33 34 00:03:56,960 --> 00:03:58,430 What was it. 34 35 00:03:58,430 --> 00:04:09,590 We have a gap or spaces like this all around the disk and in here we have a led and in here what we 35 36 00:04:09,620 --> 00:04:11,240 have optical 36 37 00:04:15,140 --> 00:04:17,160 device in here. 37 38 00:04:17,210 --> 00:04:25,760 So each time encoder turning for example forward and then led is detect this optical device from this 38 39 00:04:26,120 --> 00:04:26,780 gap. 39 40 00:04:26,780 --> 00:04:40,220 It is giving a pulse and pulse and pulse and we already saw this was 1024 PPR and 1024 PPR will be 40 41 00:04:40,310 --> 00:04:45,380 equal to 1024 gap on the disc. 41 42 00:04:45,410 --> 00:04:55,520 So when this led is detect the optical device 1024 times this disc is going to finish his turn and also 42 43 00:04:55,520 --> 00:05:05,500 we can say on this disc we have 1024 space and one turn will be equal to 1024 PPR. 43 44 00:05:05,600 --> 00:05:07,790 --- 44 45 00:05:07,790 --> 00:05:15,710 And this is I'm sorry this is a encoder that we are going to use this encoders for the motors a lot 45 46 00:05:15,710 --> 00:05:21,710 time and also you can see resolver and this is the structure of the resolver. 46 47 00:05:22,010 --> 00:05:28,480 And this is the structure of the encoder and this difference between we already said resolver is giving 47 48 00:05:28,480 --> 00:05:33,690 an analog output but encoder is giving digital 48 49 00:05:37,300 --> 00:05:45,880 output so that's so it's giving like a square wave and it's giving for example like this. 49 50 00:05:46,020 --> 00:05:48,880 This is an analog and this is digital. 50 51 00:05:48,990 --> 00:05:52,210 This is the difference between encoder and resolver. 51 52 00:05:52,530 --> 00:05:59,490 So the last thing which one is more safe this is because of why this is giving an analog output. 52 53 00:05:59,520 --> 00:06:06,030 So for example this disk can be damaged or these gaps can be damaged or it can give in one turn 53 54 00:06:06,390 --> 00:06:09,420 for example 1 PPR. 54 55 00:06:09,540 --> 00:06:17,100 So the encoder can be broken easily any time but analog signals it's coming from the reference from 55 56 00:06:17,100 --> 00:06:28,410 the resolver it is not breaking a lot of times it is more reliable more safely and much more to be useful 56 57 00:06:28,410 --> 00:06:29,850 for your projects. 57 58 00:06:29,850 --> 00:06:36,320 But you you need a drive to understand the situation of to resolver it then you can use it. 58 59 00:06:36,390 --> 00:06:39,290 So I'm finished for this video. 59 60 00:06:39,300 --> 00:06:43,260 We already saw the resolver and encoder. 60 61 00:06:43,260 --> 00:06:51,240 The structure of this two material in the next videos we will do some exercises about the encoders and 61 62 00:06:51,250 --> 00:06:52,200 resolvers. 62 63 00:06:52,200 --> 00:06:53,610 See you in the next video.